> Does your counter probe report a frequency reading when plugged into
> TP1? If so, the probe is working, if not, then your problem is with
> either the probe itself or the Q9 and Q10 circuits on the Control Board.
The frequency probe is fine.
TP3 shows 12099.11
when I switch to TP2, I read zero.
> Turn your manual to Appendix E page 11 and do the 4 test steps indicated
> at the top of the 1st column. Then compare the DC voltages during CAL
> FCTR at the leads of Q24 and U11. If that does not reveal the problem
> for you, tell us what those measurements are an we may be able to help.
>From Appendix E, the BFO fails to oscillate.
BFO Output : Vrms = 0.001
BFO buffer output : Vrms = 0.008
[measurments done with Fluke 77, AC voltage]
U11 DC voltages appear nominal
pin 1 : 1.403 manual 1.4
2 : 1.403 1.4
3 : 0 0
4 : 4.75 5.0
5 : 4.76 5.0
6 : 5.86 6.1
7 : 5.44 5.6
8 : 5.92 6.1
Q24 DC voltages are abnormal
S : 0 manual 0.0
G : 0 1.2
D : 0 1.3
Looking at the circuit diagram, nothing is soldered to the other side of
R98, V_{alc}. Could this be the problem?
I am unable to find where in the circuit diagram V_{alc} is hiding.
On the circuit board, it appears that jumpers are supposed to be there. I
am also unable to find in the construction instructions I was supposed
to (or not) place what appears to be jumpers in the area.
tnx.
Conway Yee, N2JWQ
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